Ments



(No Model.)

A. ISKE, COMBINED PUSH AND PULL.

Patented Mar. 10, 1891.

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ALBERT ISKE, OF LANCASTER, PENNSYLVANIA, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO THE SELF ACTING BELL COMPANY, OF SAME PLACE.

COMBINED PUSH AND PULL.

SPECIFICATION forming partof Letters Patent No. 448,044, dated March 10, 1891. Application filed June 27, 1890. Serial No. 356,930. (No model.)

To all whom it may concern.-

Be it known that I, ALBERT IsKE, a citizen of the United States, residing at Lancaster, in the county of Lancaster and State of Pennsylvania, have invented certain new and usefullmprovements in Push-Buttons and Knobs for Electric Bells; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The chief object of this invention is to produce a combined push-button and pull-knob whereby either pressure or a pull will close the circuit of an electric bell. This is effected by the devices hereinafter particularly set forth and claimed.

In the accompanying drawings, Figure 1 represents a side elevation of the devices embodying my invention. Fig. 2 represents a vertical longitudinal section of the same.

Fig. 3 represents in perspective, detached, the push-button and its shank, the draft-bar without the knob, and the replacing-spring. Figs. 4, 5, and 6 are additional detail views.

A designates a metallic plate adapted to be fastened to the front of a house or door-frame, and having a central opening a, also a rearward extension A surrounding said opening. A tubular draw-bar B works through said opening and extension, being guided thereby. The outer end of this sleeve protruding beyond said plate is externally screw-threaded atb to receive a tubular knob O, which is correspondingly threaded internally. The knob is therefore readily detachable; but when in place a pull on it will draw said tubular bar B outward. This brings a stud B on the inner end of said draw-bar into contact with a plate D, preferably a spring which is bent so that its outer end (Z avoids said stud, but that the shoulder (1 formed by such bending will be in the way of it. This plate D is attached to an insulating-block E attached to plate A. One wire 0 of the circuit runs to the former plate, another P running to the latter. hen the contact of said stud with said plate occurs, as stated, the circuit is closed and the bell is rung, the parts A B B being in electrical contact. This draw-bar is longitudinally slotted on top at B as shown, to allow and guide the backward and forward motion of a stud F, similar to B, on the shank or stem F of a push-button G. This stud is normally near the plate A, where the bent plate D is too high for contact therewith; but another shoulder D formed by the bending of this plate is low enough to be struck by said stud when the latter is pushed inward with said button and shank or stem. As both the shank or stem and the draw-bar are electrical conductors and in contact at their outer ends, the circuit will be closed as before, except that this is done by pushing instead of pulling. A spiral spring I surrounding said draw-bar bears at one end against stud B and at the other end against stud F. It resists the pull on the knob and the push on the button, and replaces these parts and the stem and tubular draw-bar in their normal positions after being thus displaced.

Of course by a very slight change in the arrangement of the parts or even in the bending of the spring the push or pull, or both, may be made to break the circuit instead of closing it.

The form and arrangement of the devices described may be modified in various ways without departing from the spirit of my invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In combination with a contact plate forming one of the terminals of an electric circuit, a pull-knob constituting the other terminal thereof, and provided with an at tachment for making electrical contact with said plate, a push-button which is in electrical communication with said pull-knob, and an attachment of said button arranged to be moved at will into contact with said plate, the circuit being open only when neither of such attachments is in such contact and closed equally well by a push or by a pull, substantially as set forth.

2. A push-button and its shank provided with a stud, in combination with a pull-knob and its draw-bar provided with a stud, a contact-plate arranged to be struck by said studs in opposite directions, an insulated contactplate arranged to be struck by said studs as they move inward or outward, respectively, and the circuit-wires having their terminals respectively in said contact-plate and in the other devices, substantially as set forth.

In testimony whereof Iafiix my signaturein :0 presence of two witnesses.

ALBERT ISKE.

Witnesses: Ms. B. DoNNELLY, P. DONNELLY. 

